ARM: dts: msm8916: Update reserved-memory for wcnss, venus and mba

Reserved memory for wcnss, venus and mba nodes updated
mistakenly in earlier commit.

Revert them back to original values.

Change-Id: I17e11d8ce161b0802fbd8bd81e6e830f7f586024
Fixes: 8c5aade5 ("UPSTREAM: ath10k: support extended board data download for dual-band QCA9984)
Signed-off-by: Dundi Raviteja <dundi@codeaurora.org>